Actually I think they were running out of Dirty Jobs almost constantly. He always had his bit on the end of the show pleading if anyone knew of a dirty job, to let them know on the website.
And they were already branching out into a lot of “dirty jobs” that weren’t actually dirty per-se, just dangerous, frightening, or difficult, like radio tower guys, suspension bridge painters, or technicians for the gigantic multi-story windmill generators when the show’s initial focus was on jobs that were literally in muck, dirt, sewage, poo, grease or dealt with unpleasant animals or obscenely biological stuff.
